Dust-collecting system



l'e'b.v A17, 1931. G. L.. JACKSON DUST COLLECTING SYSTEM Filed April 15. 1929 Cedre L z/ec/ISo/z Patented Feb. 17, 1931 ,Fic

GEORG L. JACKSON, OF LOUISVILLE, KENTUCKY, ASSIGNOR TO THE KIRK 6L BLUM MANUFACTURING COMPANY, OF CINCINNATI, OHIO7 A CORPORATION OF OHIO DUST-COLLECTING SYSTEM Application filed April 15,

rIhis invention relates to improvements in a dust collecting system and has for an object the provision of means whereby all waste materials received in the system are ei'ectively carried away and whereby the extremely light dry particles are acted upon in transit through the system so that they may be effectively removed by the ordinary separator.

Another obj ect is to provide a means which not only assists in preparing the lightly ioating particles for ready separation, but furthermore, assists in moving all of the material through the suction main without creating such additional pressure in the suction main as would impose a heavier burden upon the suction fan ot the system.

These and other objects are attained by the means described herein and disclosed in the accompanying' drawings in which Fig. 1 is a side elevational view of a dust collecting system embodying the structure of the invention, parts being broken away.

Fig. 2 is an enlarged ragmental, vertical section taken longitudinally of the suction main.

Fig` 3 is an enlarged ragmental view taken on line 3 3 of Fig. 2.

The dust collecting system may comprise a suction main or conduit 6, having a relatively flat bottom wall 7 and into which branch pipes 8 may connect at any desired intervals. rlhe main 6 connects with a fan casing 8 wherein the fan (not shown) is driven by any suitable means such as motor 9. 5 Discharge pipe 10 leads from casing 8 to a separator 11, ot any approved type, for example, a cyclone separator, as ragmentally shown in the drawing. A high pressure steam or fluid pipe 12 is provided conveniently adjacent the exterior of the flat bottom wall 7 of the suction main 6. 1n the drawing this is shown below the main 6 but it will be understood that it may be disposed in a plane intermediate the top and bottom of the suction main, it desired, so as to provide a maximum of head room beneath the suction main. The bottom wall 7 is slitted transversely at intervals throughout its length, the slits providing openings 13 through which nozzles 14 connected with 4longitudinal sides ofthe wall 7.

1929. Serial No. 355,180.

steampipe 12, may project. By downwardly striking a portion 1540i the wall 7 on the sides of the slit adjacent to the `:fan'casing, convenient seat `is provided Vfor receiving the nozzles 14 so that theymay direct blasts of steam or otherfluid under pressure, substantially horizontally of @the casing and along the inner Jtace of the bottoni wall 7. The nozzles 14 are flat and provide adischarge slot 16 which may be ot a generous width, extending well towards the' opposite The discharge slot 16 is greatly restricted inV height, so that ribbon-like blasts of steam may be proj ected toward the fan and so that the force of the blast'will be effective to move waste matter along thebottom wall 7 of the suction main .from one nozzle to the next so that the suction nozzle will carry ontheworlr. It will be understood that the high pressure steam blasts Vwill condense rapidly upon impact with the particles moving through the main and they will deliver to the particles the water of condensation thereby rendering the normally air borne particles heavy enough to be effectively removed by the ordinary separator. The steam, upon condensation, compensates for the initial expansion resulting from its release from the nozzles into the suction main. It will be appreciated that in this way there is no pressure accumulated so that the fan in the casing 8 does not have to remove as much air as in ordinary systems in order to effectively move the material through the branch pipes and into the suction main. rThe work of actually moving the heavier particles is at the same time taken up to a considerable extent by the force exerted by the steam blasts :trom nozzles 14.

It will be appreciated that the steam supply pipe 12 may be disposed in any convenient location and that the branch steam pipes 17 feeding the nozzles 14 may be placed in any suitable position to eil'ect connection between pipe 12 and nozzles 14.

The means of the invention thus not only eiiectively improves the operation of the dust collecting systems, but so conditions the normally air borne particles so that even the fine dust from kiln dried lumber may c.

be completely removed in an ordinary cyclone separator. This advantage alone is of utmost importance because the problem of effective separation of dust of kiln dried 5 lumber, has in many communities resulted in the necessity of removing' a plant from the vicinity of a residence district.

It will be understood that the particular construction of the nozzles may be altered from the particular construction shown in thc drawing Without departing from the spirit and scope of the present invention.

What is claimed is: l. In combination a suction main for a dust collecting system comprising a Hat bottom Wall having transverse spaced slots therein and depressions in the interior face of said bottom Wall on a common side of said slots and iattened steam nozzles mounted in said depressions and extending through the slots for discharging steam into the suction main.

2. In combination a suction main for a dust collecting system comprising a Hat bottom Wall having transverse spaced slots therein and depressions in the interior face of said bottom Wall on a common side of said slots and flattened steam nozzles mounted in said depressions and extending 3o through the slots for discharging steam into the suction main in a plane substantially parallel to the plane of the bottom Wall.

In testimony .whereof, I have hereunto subscribed my name this 11th day of April.

GEORGE L. JACKSON. 

